Air-compressor unit



Sept. 25, 1928.

A. B. SCHLESINGER AIR COMPRESSOR UNIT Filed Feb. 18, 1927 l Patented Sept. 25., 1928i.

UNITED STATESv AUGUST B. scRLEsmGER, or DETROIT, MICHIGAN, AssIGNOR TO AMERICAN EOUNDRY MOTORS COMPANY, or NEW YORK, N. Y., A CORPORATION OF DELA- WARE.

AIR-COMPRESSOR uNIT.

i' l*Applikation mea rebruaryis, 1927. smal No. 169,194,

Reference ishadto the accompanyingdrawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of the claims will occur -to persons skilled in the art.

In said drawings:

My invention relates to air compressors and more particularly to an air compressor assembly or unit for installation on an internal combustion engine. l

The principall object of this invention is to provide an air compressor unit or assembly which when arrangedinoperative position on an internal combustion engine will be operatively connected therewith and driven thereby and provide an oil-tight connection between the engine casing andthe compressor.

A further object of the invent-ion resides in the provision of a compressor unit in combination with an internal combustion engine and so arranged that the engine-casing will receive and house-the compressor piston'operating means and thereby dispense with the usual compressor crank case.

The invention Yalso contemplates an air compressor unit having a drive or operating element which with the compressor attachedto the engine casing mates with a rotary drive element of the internal combustion engine to be driven lby the latter.

Another objectof this invention is the provision of an air compressor for use with an internal combustion Vengine which is assembled in toto as a unit and then applied as a Y unit to the internal combustion engine; the unit consisting of cylinders and cooperating o pistons with the'cylinders capable of adjustment relative to the crank shaft to which the pistons are connected, whereby to vary the clearance space between the top of the plstons and the cylinder heads when the pistons are in their extreme upper position and thus vary to a predetermined degree the air compressed by said pistons.

In the drawings: Fig. l is a vertical sectional view of my air compressor unit Yassociated with an internal combustion engine, the view being taken on the line 1-1 of Fig. 2, the casing of the engine being shown in broken lines;

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. 1.

Referring to the invention'in detail, a conventl'onal internal combustion engine casing 1s deslgnated at 5 and is provided with an opening 6 at one end of its upper wall, theV opening extending entirely across the casing and located above the engine 'drive shaft 7.

An air compressor unit or assembly is designated `at 10 and comprises a plurality of cylinders 11 in which air compressing pistons 12 are mounted.

For the purpose of mounting the compressor unit or assembly on' the engine casing 5 so as to take power from the drive shaft 7 to operate the compressor and at the same time close the opening 6, the pump cylinders 11 are cast with a continuous hollow base or flanger 13 the lower edges of which are formed into relatively heavy horizontal supportingv attaching portions 17 which rest upon the casing 5 and surround the opening 6. Spacedl hollow bosses 14 are provided in the lower yedge of the base or flange 13 to take attaching bolts15 engaging registering openings 16 aroundthe edges of the opening 6. By adjusting the bolts 15 the casing 5and base or ange'13 will be drawn tightly together producing a liquid and gas-tight fit; Y

Disposed below the base or flange 13 is a crank shaft 19 operatively connected with the pistons 12 by means of connecting rods 20,' and journaled in bearing brackets 18 which latter are secured by suitable means to the A bearing portions 17, heretofore mentioned.-

A relatively large pinion 21 is iixed to one end of the crank shaft 19 which meshes with a drive pinion 22 fixed to the drive shaft 7.

The device of the present invention is made and assembled for attachment as a unit to an internal combustion engine and clearance spaces between the tops of the several pistons and the cylinders have been predetermined. It becomes necessar sometimes to vary the clearance space to o tain a different capacity of the unit to meet various'conditions, and therefore it isdesirable to so form the unit that the parts thereof may be adj usted whereby to regulate or control the degree or amount of air compressed bythe pistons. To that end equallyvary the clearance between each. piston and cylinder when the fermer are, in their uppermost position, to a degree corresponding to the shims employed; it being also atppwrent'that the desired clearance Ina-y be obtained' to anicety; l f It will be apparent that by varying the number of shims interposed between the portion 17 and bearing 18, the casingV 13 may be adjusted relative to the crank shaft, lthus f varying, the strokes of the; pistons, l2,v relative V tothe cylindersll and. consequently varying tbc casing,4 sliims' or gaskets as long as the coml'aression produced by said pistons- The entire` unitl maybe adjusted relative t toJr the engine casing'. by interposing between ory remoying from: between thev portiorrgll?t and pinion 2l ie, retained flrviegenseseltlent w511th the 111111013 22. thereby Previdnlng e ,Ineens 12o-r aad-rusting ,the urltte eernneneete tery weer `or to afford proper meshing of the 1inionA 21 'and pinion 22 in the event of slig t variations in mechanical construction which lsome;-v times occur. l. l. v

y With Amy invention it will be apparent that the compresso-r unit may bey readily installed on lthe engine casing and incident to Such inf stal-lation thepinionQl will bebroughtinto operative relationto the pinion22.- It will be furthernoted thatthis combination obvi- V,ates the necessi y of the Y usual crank case for thecr'ankshaft 19'.. r Wheteelemede: ,Y

1.7111 2.111 aircompessor'lthe combination of eylndere, .ein .atteehing bese,A pistone., ereik shaft te which the nis-tene ereeenneeteeli and b eeringe sunpertingthe erankslleft. and. Secured to the base, said base being adjifistable 'with respect to thebearings where-by to simultaneously vary the clearance between the pis,-Y

tons and'cylinders when the. former arein their uppermost posit-ion.

12. V'In an air compressor, the combination of V cylinders', an attachingbase, pistons,ancl a.

Ier1indelen; Pteteesee etteehing eren-Jr Shaft tecrank shaft to, which the, pistons are,V connect-v ed", means for Yaryingfthe, clearance. between the pistons and the cylinders whereby to vary the air compressed comprising bearings sethe crank-shaft; said '-basefebeing" with respect to the bearings.

3". In an air compressor, the combination of cured to the#attacltringlense"'andl Sporting ustable shaft to which the pistons are connected, bearings supporting-.Seid ,creek enfilemerelely- Seemed; te thefbeee; ,enetmeersintere posed between the'beniings: and heee teVV very the; eenneetiee ef :bei beerimgeft-herewith nietenennd .eylinflerse whereby teeverythe: eleerenebetween the.

eir eernpreesgr .comprising in eembneten, a untlravinge.. plnretityef pistons, a crank shaft to which the pistoni Yare. eonneeted, a plurelity .et ,eenrreeteel eylindersn whieh tleplstene Werk, bearingsseenred te the; fry-Enders fer mennting ,the crank Shafts said bearings being connected to sgidrcylin.

elersfneneli e, manneree t; Permit .adjustment et? the eylnders, with reeiect tberete tie-v2.15" a. 70

the eleelf'enee :between eee f, eisten .end ite @ylleder te en" eel-Hell degree.;

. e An air eelnple'eserfier etteehnient er;

internal eenlbiletmn engine A.tenerti'eine in..

base, a crank c eembinatiert. e. withering e rlerelty. et. eene AUGUST B. scritnsnenn.

Crank shet; seid beer-4. i 

